Practice question · Match the pairs
Match each problem type to the best conservation law or principle.
- Collision between two objects
- Object on a roller coaster (no friction)
- Object on an incline with friction
- Satellite in circular orbit
- Newton's second law
- Conservation of momentum
- Conservation of energy
- Gravitational force = centripetal force
Hints
- Ask what the problem gives you and what it asks for.
- Collisions point one way; smooth height changes point another.
Show the answer
- Collision between two objects → Conservation of momentum
- Object on a roller coaster (no friction) → Conservation of energy
- Object on an incline with friction → Newton's second law
- Satellite in circular orbit → Gravitational force = centripetal force
Why
Choosing the right principle depends on what is conserved or what forces act.
Practise Problem-Solving: Mechanics
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